Sighting in an optic can be a time consuming and cartridge-killing task. Designed to reduce ammo waste, the Sightmark Universal Green Laser Boresight Pro (SM39044) attaches to the end of your barrel and produces a strong green laser, allowing you to sight-in or double-check zero on your rifle, shotgun, or pistol with ease. Using its retractable arbor design and an ultra-strong, expanding base, this versatile boresight fits standard .17-.50 caliber barrels.
The Universal Green Laser Boresight Pro’s durable, compact design makes it extremely easy to pack and transport. CR123A batteries, a digital on/off, and mode controls deliver exceptionally 
long life. The retractable arbor also helps with battery life and on/off functionality of the laser, allowing the unit to turn on once the arbor is depressed and turn off when removed from the barrel.
Stop wasting time and ammo at the range trying to get on paper. The Sightmark Universal Green Laser Boresight Pro gets you on there in seconds so you can spend more time (and ammo) making fine adjustments. M.S.R.P. $119.99
FOG HORN 